Cribbing spring



April 20, 1965 B. c. WELLS 3,179,741

Filed July 15, 1963 2 Sheets Sheet 1 BY BRUCE C. WELLS April 20, 1965 B. c. WELLS 3,179,741

CRIBBING SPRING Filed July 15, 1963 2 Sheets-Sheet 2 INVENTOR.

BY BRUCE C. WELLS United States Patent 0 3,179,741 CRIBBING SPRING Bruce C. Wells, 611 Park Ave, Louisville, Ky. Filed July 15, 1963, Ser. No. 295,615 1 Claim. (Cl. 174-440) The object of the invention is to reduce radio and television interference caused by loose hardware on high voltage lines using suspension type insulators and to provide a suitable device that can be installed on said lines without taking said lines out of service.

FIG. 1 shows the cribbing spring in perspective and in working position.

FIG. 2 shows a plan view of the cribbing-spring out of service.

FIG. 3 shows a horizontal side view of the cribbing spring out of service.

The invention relates to an improved spring, herein called a cribbing spring, used in a suspension type insulator.

On high voltage systems a static potential is induced on the various metal parts of a suspension type insulator near the conductor that it supports. This causes radio and television interference unless the individual parts of the insulator are under heavy contact pressure, or unless some means of by-passing these parts is used. The cribbing spring is designed to perform both of these functions.

The insulator 1 has an inner porcelain recess C and includes an insulator pin 2 forming part of a ball and socket joint 3, which is connected by a clevis joint 4 to a clamp 5 carrying a conductor 6.

The cribbing spring A consists of one continuous piece of spring rod or wire material having a pair of large Ushaped loops extending vertically and joined at their lower ends by a horizontal semi-circular loop. The upper ends of the U-shaped loops are joined to two smaller end loops B that press hard against each other at an angle SllfllCiEIlt to be forced astraddle an insulator pin 2.

The cribbing spring A is mounted on an insulator 1 with the end loops B astraddle an insulator pin 2 and received in an inner porcelain recess C of the insulator 1. The semicircular loop presses on the conductor clamp 5 with the large U-shaped loops astraddle a ball and socket joint 3 and clevis joint 4. The spring is held in position by its pressure and by the recess C. The cribbing spring A is under pressure to hold the movable parts of the ball and socket and clevis joints under a contact pressure greater than that caused by the action of gravity. It also functions as a bypass for these parts.

I claim:

In a suspension type insulator having an insulator pin connected by a joint assembly to a conductor clamp; a compression spring having two end loops clamping against the insulator pin; a pair of large U-shaped loops extending from the endloops on opposite sides of the joint assembly, said large U-shaped loops at their other ends being joined together by an additional loop and pressed against said conductor clamp.

References Cited by the Examiner UNITED STATES PATENTS 318,789 5/85 Patton. 402,434 4/89 Gjestvang. 1,400,253 12/21 Wicker. 2,522,991 9/50 Caserta. 2,999,125 9/61 Young 174l41 FOREIGN PATENTS 713,199 11/41 Germany. 880,992 l/ 43 France.

ARTHUR L. LA POINT, Primary Examiner.

Patented Apr. 20, 1965 

